#' @param k The number of clusters to create
#' @param max_iter The maximum number of iterations to use.
#' @param seed A random seed. Set this value if you need your results to be
#'   reproducible across repeated calls.
#' @param features_col Features column name, as a length-one character vector. The column should be single vector column of numeric values. Usually this column is output by \code{\link{ft_r_formula}}.
